TY  - JOUR
AU  - N. E. Steenrod
TI  - Cohomology operations, and obstructions to extending continuous functions
JO  - Matematika
PY  - 1958
SP  - 11
EP  - 48
VL  - 2
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MAT_1958_2_6_a1/
LA  - ru
ID  - MAT_1958_2_6_a1
ER  -